Types of Doors
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Laundry Room Closet Makeover | Interior Design Styles and Color Schemes for Home Decorating from HGTV >> http://www.hgtv.com/design/decorating/design-101/turn-a-closet-into-a-laundry-room-pictures?soc=pinterest
Miniature tutorial - wooden planked door, medieval but could be applied to farm doors as well
Matty - commercial Steel louvered doors. Could be a cost effective 'shutter' solution that is strong, cheap, maintenance free. For entrance door or over the bathroom window (so people can't look in). Could be painted any colour.